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>needs an app

Now imagine the same product but with different physical toggles or buttons on it for all the different charging modes. No apps. That'd be great.

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Switching between 500 mA, 2.1A, and USB-PD or QC is technically simple, but again you're making consumer electronics for a very, very small group of people.

How would it determine when the attached device reaches 80% state of charge? Or what the time of day is? How could you program a schedule for weekdays and weekends?

There are good reasons for Chargie to have an app, it's not just there to siphon up analytics.

I'm thinking something like a switch on the side to switch between slow, fast, and using the app.

> How would it determine when the attached device reaches 80% state of charge?

The same way it determines that the battery is fully charged. It is a solved problem.

This information is not available on the USB-C connection. The 'charger' is simply a power supply, it does not actually manage the regulation of current into the battery.

Or even a way to communicate this to the charger from the phone using the vendor extension to PD protocol negotiations…

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